$TTL    86400

@           IN    SOA      {{ services['bind']['domain']['internal'] }}.{{ domain['internal'] }}. {{ services['bind']['domain']['internal'] }}.{{ domain['internal'] }}. (
                {{ network['dns_serial'] }} ; serial
                3600       ; refresh (1 hour)
                1800       ; retry (30 minutes)
                604800     ; expire (1 week)
                86400      ; minimum (1 day)
            )
            IN    NS       {{ services['bind']['domain']['internal'] }}.{{ domain['internal'] }}.
{% 
    set hosts = (
        network
        | dict2items
        | rejectattr('key', 'in', ['dns_serial', 'subnet', 'reverse_zone'])
        | list
    )
%}
{% 
    set alias_hosts = (
        network
        | dict2items
        | rejectattr('key', 'in', ['dns_serial', 'subnet', 'reverse_zone'])
        | selectattr('value.alias', 'defined')
        | list
    )
%}
{% for item in hosts %}
{% set name = item['key'] %}
{% set host = item['value'] %}
{% if host['ipv4'] is defined %}
{% if host['ipv4']['server'] is defined %}
{{ "%-12s" | format(name) }}IN    A        {{ host['ipv4']['server'] }}
{% elif host['ipv4']['client'] is defined %}
{{ "%-12s" | format(name) }}IN    A        {{ host['ipv4']['client'] }}
{% endif %}
{% endif %}
{% if host['ipv6'] is defined %}
{% if host['ipv6']['server'] is defined %}
{{ "%-12s" | format(name) }}IN    AAAA     {{ host['ipv6']['server'] }}
{% elif host['ipv6']['client'] is defined %}
{{ "%-12s" | format(name) }}IN    AAAA     {{ host['ipv6']['client'] }}
{% endif %}
{% endif %}
{% endfor %}
{% for item in alias_hosts %}
{% for alias in item['value']['alias'] %}
{{ "%-12s" | format(alias) }}IN    CNAME    {{ item['key'] }}.{{ domain['internal'] }}.
{% endfor %}
{% endfor %}